Tom Ivar Helbekkmo writes:
It's probably not what I thought. My own message failed DMARC on
arrival back here from the mail server, and the report shows that it
does not contain any DKIM signature. Are they removed by the mailing
list software?
Yes. Which is perhaps wrong.
It's not simple. On reflection, I think mailing list software should remove
an existing DKIM-Signature if and only if other changes invalidate that
signature. Unfortunately that's not easily checked.
I change the forwarder to leave the signatures in, and will look how this
message works.
Mail is fairly clean now, so leaving signatures in shouldn't break much, if
anything at all. I hope noope oversigns with List-ID, for example.
(Oversigning means to include nonexistent header fields in a DKIM
signature. Quite a sensible thing to do in some circustances.)
Arnt
